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  1. Graphics Page showing Heatpump cycle with defrost

    http://www.youtube.com/watch?v=GpXj-m3Osks
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    Just to add on this. The least costly thing to...

    Just to add on this.
    The least costly thing to try might be changing an area or zone to adjustible diffusers and adjusting them to a more horizontal throw. Adjusting the center parts of the...
  3. Good grief, you have no idea what I was talking...

    Good grief, you have no idea what I was talking about in #16

    Here it is again.


    "Actually every blower has a design curve, giving various CFMs at different SPs and RPMs.
    Hard to find any...
  4. Now I'm sure you have no clue ! WFIW I agreed...

    Now I'm sure you have no clue !

    WFIW I agreed with him in my first post.
    The second post was general information.

    Maybe you need to slow down and get a grip.
  5. Not sure if you understood either of my two post...

    Not sure if you understood either of my two post on this thread.
  6. Thread: Furnace Runtime

    by Rewind
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    Got to be cautious when looking at runtimes at...

    Got to be cautious when looking at runtimes at different OATs. The wind speed and direction along with the structure condition makes a lot of variables.
  7. The old blower wheels would simply unload if the...

    The old blower wheels would simply unload if the ESP static went much above 0.50", newer blowers are engineered to handle a higher ESP without unloading.

    -------------------------

    Actually...
  8. Originally Posted by udarrell First, Oil...

    Originally Posted by udarrell
    First, Oil furnace usually have a very large heat-exchanger very near the top of the furnace; if the evaporator coil is not installed at least 6 inches above the top...
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    Here is some information you can use for a...

    Here is some information you can use for a reference.

    It also gives some good information on how cycling affects efficiency.

    These are actual readings on my HP.
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    OK here is a way to prolong the Heat pump life...

    OK here is a way to prolong the Heat pump life (G)
    Have a control system like this.

    The attached jpg is a picture I took of one of the graphics pages I have for my home. I took it last November...
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    The jest of the above is to adjust your...

    The jest of the above is to adjust your thermostat for the widest differential your comfort will tolerate to obtain the best efficiency and equipment service length.
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    8,513

    The sweet spot would be the least cycles possible...

    The sweet spot would be the least cycles possible that produces a degree of comfort.

    A typical cycle is something like this.

    Thermostat calls..... compressor comes on. ------------------------...
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    3,671

    Here are a couple jpgs of the top and bottom...

    Here are a couple jpgs of the top and bottom spreadsheet you can look at and see if you want it. My email address is in my profile.
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    Offer goes for anyone else also.

    Offer goes for anyone else also.
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    3,671

    I made a spreadsheet a few years ago that might...

    I made a spreadsheet a few years ago that might help you compare heating cost. I see I can not attach that type file here so email me if you want it. (Price is right only a thank you will do)
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    I said I was leaving but I had to respond to this...

    I said I was leaving but I had to respond to this post.

    Very well put, you are absolutely correct.
  17. Replies
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    13,273

    One more post on the subject and I'll go. If...

    One more post on the subject and I'll go.

    If any doubts exists about the example do this:
    Measure it for yourself. It is easier to do if you have a straight throw register. Use a very, very...
  18. Replies
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    13,273

    I failed to explain an important part of my...

    I failed to explain an important part of my previous quote.
    Example: A typical supply register with a 20 foot throw as specified with a 25 fpm terminal velocity. At the 20 foot location the air is...
  19. I refer you to Quote #6 in this thread. Rewind

    I refer you to Quote #6 in this thread.
    Rewind
  20. Trying above

    Trying above
  21. I gave a couple of examples in my previous posts....

    I gave a couple of examples in my previous posts. The one about my home works very well, although I have to do it manually by observing the forecast before hand. The commercial examples would be...
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    "The location of the return is not important if...

    "The location of the return is not important if the supply air is distributed correctly."

    Have not visited this thread since I last posted. It has been interesting reading all the posts.
    ...
  23. Agreed ! I have noticed in the last few years...

    Agreed !

    I have noticed in the last few years the temperature forecasting has gotten pretty accurate.
  24. I can see using the forecast in a couple ways for...

    I can see using the forecast in a couple ways for commercial buildings. If the forecast is for a good percentage of sun for the day, buildings with lots of glass, the systems on the affected sides...
  25. Gee Rad1 you are a hard worker, coming in after...

    Gee Rad1 you are a hard worker, coming in after dark like that..............
  26. It would be nice to have access to something like...

    It would be nice to have access to something like that but how to interface all the different locations might be hard...........or not?

    I use the weather forcast is a couple ways at home. If sun...
  27. Replies
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    2,712

    Never saw the tube within a tube design, but have...

    Never saw the tube within a tube design, but have seen the stats on some Rooftop multizone steam coil units.

    With 100% steam MAUs the F&BP dampers require the linkages set right when dealing with...
  28. Replies
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    2,712

    Might add, have worked with steam 100% MAUs with...

    Might add, have worked with steam 100% MAUs with lower than -40 F ambient. Sometimes even with F&BP dampers it get scary !
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    If you don't have face and bypass dampers for the...

    If you don't have face and bypass dampers for the steam coil and run the steam coil wide open below freezing conditions, it is just waiting to happen.
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    Millertime77, I apologize for getting off the...

    Millertime77, I apologize for getting off the track.
    I can see I am not helping the issue so I will exit the discussion.
  31. Replies
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    Oh boy! I respectfully disagree with the above...

    Oh boy! I respectfully disagree with the above statement.

    The second part of the statement says "if the supply air is distributed correctly."

    btw, I was a mechanical designer and commercial...
  32. Replies
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    The location of the return is not important if...

    The location of the return is not important if the supply air is distributed correctly.

    The statement was referring to a location not the number of returns. For example the location of the...
  33. Replies
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    Good point. I was refering to the location of...

    Good point.
    I was refering to the location of the return(s) not the number.
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    Difficult to educate you with the information...

    Difficult to educate you with the information supplied. I will give it a go but others in the trenches may be able to do a better job.

    First it would help to know the area you live. If 20 degrees...
  35. Replies
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    I'll offer something: The location of the...

    I'll offer something:

    The location of the return is not important if the supply air is distributed correctly.

    This includes the correct duct sizes, branches, registers (registers should be...
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    If you would like to see some typical...

    If you would like to see some typical temperatures, go here and check the graphics picture I put in a post. http://hvac-talk.com/vbb/showthread.php?t=442322&page=3

    rewind
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    Have a sheet metal shop make and install a 90...

    Have a sheet metal shop make and install a 90 degree sweeping elbow on top of the condenser that extends about 12 inches beyond the cabinet. Make the elbow inside dimensions the same as the top of...
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    But I'm certainly not an expert about all...

    But I'm certainly not an expert about all buildings, every where. Hopefully others will chime in with what they've seen and what's common to their geographical area.[/QUOTE]

    Some of my...
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    I get accused of having "to much time on my...

    I get accused of having "to much time on my hands" all the time.

    I probably had all the parts already, if the parts were purchased it would not need to be more than $15.00 or so. We live on a...
  40. Replies
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    Yes a small subdivision in the country. It takes...

    Yes a small subdivision in the country. It takes quite a loud sound to activate it. I only had to adjust it once after the installation. It catches the storms coming and going just right. The...
  41. Replies
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    Some of you may get a kick out of this

    I have several unique and different applications that I dream up, here is one.

    A previous control panel is next to the circuit breaker panel that has contactors, idec relays and a time delay...
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    To explain the calculation more: C0 = low part...

    To explain the calculation more:
    C0 = low part of your scale.
    P0 = variable external point
    C1 = curve of your scale. (you can vary this until you have it close enough to what you want)

    rewind
  43. Replies
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    This may help if I understand the question...

    This may help if I understand the question correctly. Example point (Setpoint)
    Calculation

    CO+PO*C1
    PO = OAT OR ?
    C0 = 8.8 (number used in one of mine)
    C1 = 0.43 (number used in one of mine)...
  44. Replies
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    Took a picture of the graphics page, thought some...

    Took a picture of the graphics page, thought some of you old CSI'ers would like to see an old CSI DOS graphics. The page has the maximum number of points that can be put on a page.
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    6,398

    I have CSI controls in my house for 15 years. It...

    I have CSI controls in my house for 15 years. It consists of a UCI and five UC’s. It has 79 external points plus 70 internal points. It covers the heat pump, lighting, security, visual...
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    "The only reason you should need a restore is if...

    "The only reason you should need a restore is if the controller loses it memory which would wipe out the programs".

    I have also found that sometimes when additional programming or with changes in...
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    I have found the Inet equipment I've used to be...

    I have found the Inet equipment I've used to be very stable. The first thing that comes to mind reading your post is when was the last time a save and restore was performed. I see you have had...
  48. Thread: CSI INET4

    by Rewind
    Replies
    7
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    766

    Thanks Dazza I have had the software for years...

    Thanks Dazza

    I have had the software for years and just never used it. I got it loaded on an older computer running win98 with no trouble yesterday. I have used the DOS version for so many...
  49. Thread: CSI INET4

    by Rewind
    Replies
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    Thanks Dazza I downloaded Microsoft's virtual PC...

    Thanks Dazza
    I downloaded Microsoft's virtual PC but alas it does not have 95. It just goes back to 98. I'll keep on fiddling with it for awhile.
    Thanks again
    Rewind
  50. Thread: CSI INET4

    by Rewind
    Replies
    7
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    766

    CSI INET4

    I am trying to run INET4 on XP. I have all the applications set to compatibility windows 95. The driver appears to be running as I can go to DOS, run it and it says it is running. When I try to...
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